The difficulty we've had is that during and right after a meltdown he is not rational. No point having that discussion.
At other times, he is very reluctant to discuss his feelings. He'll often shut down if we try too hard.
But these are all great ideas and we probably should try to integrate them.
Absolutely, I would only discuss it as a toolset for him to assert his own control and never anytime near a meltdown. But it's like the "How many therapists does it take to change a lightbulb?" -- "One, but the lightbulb has to want to change."